in 2001 scott bernstein at the center for neighborhood technology in chicago said what happens if instead of measuring co2 per mile, we start measuring per person or per household? because there are only a certain number of us, and we can choose toly in places where we -- to live in places where we pollute more or less. if you look at per household, the red and green flip, and by far the healthiest place you can live is in the city. manhattanites use a third of the electricity of people in dallas. why? well, they're heating and cooling their neighbors, right? their apartments are touching. but even more importantly than that is the less driving they're doing. transportation is the greatest single contributor to, um, most civilians' greenhouse gas. you know, in our daily lives the biggest choice we can make, you know, when i built my house in washington, d.c., i cleaned the shelves on the solar water heater, i got the super insulation, i got the bamboo flooring, i have a wood burning stove that supposedly a log burn anything my wood burning stove contributes less co2 to the environment tha